<?php
/**
 * select-processor.php
 *
 * This file implements the processor for the SELECT statements.
 *
 * Copyright (c) 2010-2012, Justin Swanhart
 * with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
if (!defined('HAVE_SELECT_PROCESSOR')) {

    require_once(dirname(__FILE__) . '/select-expression-processor.php');

    /**
     * 
     * This class processes the SELECT statements.
     * 
     * @author arothe
     * 
     */
    class SelectProcessor extends SelectExpressionProcessor {

        public function process(&$tokens) {
            $expression = "";
            $expressionList = array();
            foreach ($tokens as $token) {
                if ($this->isCommaToken($token)) {
                    $expressionList[] = parent::process(trim($expression));
                    $expression = "";
                } else {
                    switch (strtoupper($token)) {

                    // add more SELECT options here
                    case 'DISTINCT':
                    case 'DISTINCTROW':
                    case 'HIGH_PRIORITY':
                    case 'SQL_CACHE':
                    case 'SQL_NO_CACHE':
                    case 'SQL_CALC_FOUND_ROWS':
                    case 'STRAIGHT_JOIN':
                    case 'SQL_SMALL_RESULT':
                    case 'SQL_BIG_RESULT':
                    case 'SQL_BUFFER_RESULT':
                        $expressionList[] = parent::process(trim($token));
                        $expression = "";
                        break;

                    default:
                        $expression .= $token;
                    }
                }
            }
            if ($expression) {
                $expressionList[] = parent::process(trim($expression));
            }
            return $expressionList;
        }
    }
    define('HAVE_SELECT_PROCESSOR', 1);
}
